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How would you link a custom iframe?

I am wanting to link an iframe that is untitled, and I have gotten some code that lets me create an iframe, I just cannot figure out how to link the iframe. My code just lets me open the iframes, and I cannot figure out how I could modify my code to make it linkable, and I have seen this done before, but I was wondering if anyone could help me. (I do use it as a bookmarklet as well)
Javascript:
(function() {
var win = window.open();
var f = win.document.createElement("iframe");
window.focus();
var url = win.prompt("enter url", "https://");
if (!url) return;
win.document.body = win.document.createElement("body");
f.style.width = "100vw";
f.style.height = "100vh";
win.document.body.appendChild(f);
f.src = url
})()

web page redirect javascript

I dynamically create a link to a. 'mywebsite' is a variable. Everything works but the mywebsite page replaces that of the code. I want to open mywebsite in another page.
May I have a help to solve the problem ?
var mylink = document.createElement("a");
var textForButton = document.createTextNode("More details");
mylink.appendChild(textForButton);
mylink.setAttribute("href", mywebsite);
document.body.appendChild(mylink);

You should set the linke target as this:
mylink.setAttribute("target", '_blank');
Your code my be something like this
<script>
window.onload = function () {
let mywebsite = "http://www.google.com";
var mylink = document.createElement("a");
var textForButton = document.createTextNode("More details");
mylink.appendChild(textForButton);
mylink.setAttribute("href", mywebsite);
mylink.setAttribute("target", '_blank');
document.body.appendChild(mylink);
};
</script>

You can set target=_blank attribute to do this.
mylink.setAttribute("target", "_blank");
So that once you click on the link that you have generated it opens in new tab.

Dynamically modify the url using javascript

I would like to change the url of the page when the user select another page to visit. The url is dynamically replace the original one.
eg.
If user visit page 1 , the url will be book.html?page=1
If page 30 then book.html?page=30 and so on.
However, when I change the link using javascript, it falls into a infinite loop.
It seems I keep visit->change link ->visit ->change link->.... How to fix this problem?
eg. When the link change, don't access the page.
var currURL = $(location).attr('href');
var index = currURL.indexOf('?');
currURL = currURL.substring(0, index != -1 ? index : currURL.length);
// fall into loop
$(location).attr('href', currURL + '?page=' + pageNo);

You can do this pretty easily with just standard javascript.
if(location.href.indexOf('?') !== -1 && location.href.indexof('?page=') === -1)
{
var urlArray = location.href.split('?');
var newURL = urlArray[0] + "?page=" + urlArray[1];
location.href = newURL;
}

Bitly API - JavaScript function to open new window

I am using a script i found here to dynamically generate short link for my Tweet buttons and it works perfectly well, but the only thing i cant seem to do is create the link to open in either a new tab or preferably a popup window.
I have tried several variations of the window.location section of the script but so far I've had no luck. If anybody could point me in the right direct I'd be very grateful.
This is the script I am using...
<script>
var TweetThisLink = {
shorten: function(e) {
// this stops the click, which will later be handled in the response method
e.preventDefault();
// find the link starting at the second 'http://'
var url = this.href.substr(this.href.indexOf('http:', 5));
BitlyClient.shorten(url, 'TweetThisLink.response');
},
response: function(data) {
var bitly_link = null;
for (var r in data.results) {
bitly_link = data.results[r]['shortUrl'];
break;
}
var tweet_text = "Text for the Tweet goes here"
window.location = "http://twitter.com/home?status=" + encodeURIComponent(tweet_text + ' ' + bitly_link + " #Hashtag1 #Hashtag2");
}
}
jQuery('.tweetlink').bind('click', TweetThisLink.shorten);
</script>
Many thanks in advance :)

Normally you could just do window.open:
window.open("http://twitter.com/home?status=" + encodeURIComponent(tweet_text + ' ' + bitly_link + " #Hashtag1 #Hashtag2");
BUT, since you are doing an ajax call before this happens, chances are that this window popup will be blocked by the browser, since the window.open command is no longer associated with the click (browsers allow a certain time before a window.open command falls under non-initiated "popup").
A solution would be to first open the window on click (in your shorten function):
var win = window.open('about:blank');
And then redirect in your response function:
win.location = 'http://twitter.com/etc...';
Demo: http://jsbin.com/usovik/1

Perhaps you're looking for
window.open("http://example.com");

How to Update URL for Dynamic URLs

ShareThis does not seem to have a way to update URL which dynamically changes for html5 history-enabled or ajax-driven sites.
I tried this function to update it but URL remains original:
function initShareThis(){
var el = document.getElementById("lotShareThis");
var target = el.firstChild;
for (var i in stWidget.shareables) {
if (stWidget.shareables[i].element === target) {
stWidget.shareables[i].url = window.location.href;
break;
}
}
el.firstChild.onclick();
}
I also tried this but no any effect:
stWidget.addEntry({
"url": document.location.href,
"title":document.title
});
Any good advice whoever came across this situation?

If you want to try this using AddThis, you can change the title and url by updating the page's title and history like this:
var title = "New Title"
window.document.title = title;
window.history.pushState({path: href}, title, href);
And then you just have to call:
addthis.toolbox('[selector for AddThis buttons]');
This will force all the share buttons to update themselves and use the new title/url specified. If you're still struggling with ShareThis, give this a try.

stWidget.shareables[0].url = window.location.href;